The Osprey Raptor 14 Pack is a hydration pack for mountain biking. The 14 liter Raptor is the largest in the series, for carrying extra gear on longer bikes out in the mountains, on the trail, and sure, you can even bike around town with it on. When you're in the saddle for three hours or more the 3 liter Hydraulics™ reservoir keeps your throat from getting parched and the bag carries all the extras you might need along the way. Extra layers, a few snack bars or maybe a little picnic lunch in the main section, extra water in the side mesh pockets and your rain shell in the front mesh stretch pocket. A slash pocket for your phone and the bottom pocket secures the roll-up tool pouch in case you need to make some tweeks to your rig.

Please note that the info provided above refers to the torso size each pack will fit, and NOT any dimensions of the pack. Below are some steps for how to get your torso length. You should probably have someone help take this measurement for you so it is accurate. And they might accidentally touch your butt.

HOW TO MEASURE TORSO LENGTH:
• Start at the iliac crest, which is the top of the hipbones on the side of your body. These act like a shelf for supporting a pack hipbelt.
• From this level on your spine, measure to the C7 vertebrae, the knobby bone at the base of your neck when you put your head down.
• Make sure you keep your back as straight as possible while measuring.
• This torso measurement determines what size Osprey pack you should carry. Refer to the size charts above to find your ideal size.
• If you are in between sizes, it is ideal to try them both on before ordering.

HOW TO MEASURE HIPBELT SIZE:
• Measure around your hips at your iliac crest, NOT your waist.
• A properly fitted hipbelt rides centered over the hipbones and needs to be very snug.
• The padded portion should wrap well around your hips, leaving a gap of 3 to 6 inches between the tips of the both hip pads when securely tightened.
• Refer to the Hipbelts size chart above to help determine your ideal Osprey pack size, but again, your torso length is what should determine your pack size, NOT the hipbelt.